1 files changed, 3 insertions, 0 deletions

diff --git a/src/Blocks/BlockPiston.h b/src/Blocks/BlockPiston.h
index f8851e091..0001a5787 100644
--- a/src/Blocks/BlockPiston.h
+++ b/src/Blocks/BlockPiston.h
@@ -81,6 +81,9 @@ public:
 		}
 	}
 
+	/** This method converts the magic piston metadata into a direction vector.
+		This vector has a length of 1 and points into the direction, in which the piston will extend.
+	*/
 	static Vector3i GetDirectionVec(int a_PistonMeta);
 
 	static void ExtendPiston(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World);